Method of testing the heat insulation action of bodies especially of heat insulation bodies

Abstract

A method of testing heat insulation shaped bodies for purposes of evaluation wherein a shaped heat insulation body is placed in a measuring space where the initial temperature of the heat insulation body is measured under ambient conditions prior to heating. The shaped heat insulation body is then subjected to thermal radiation for contactless heating for a sufficient period of time to heat the body to an elevated temperature. Then the radiation is removed and the initial temperature decrease of the body is measured with contactless temperature measurement to obtain a temperature/time profile. The thermal conduction coefficient |k| is calculated as follows: ##EQU1## and compared with a standard thermal conduction coefficient, wherein (t) is time, θ o is the temperature the surface of said body after heating, θ u is the temperature of the surroundings, and θ(t) is the surface temperature at the time (t).

We claim: 
     
       1. A method of testing heat insulation shaped bodies for purposes of evaluation comprising placing a shaped heat insulation body having a surface in a measuring space, measuring the initial temperature of said heat insulation body under ambient conditions prior to heating;   subjecting said shaped heat insulation body to thermal radiation for contactless heating of said surface for a sufficient period of time to heat at least said surface of said body to an elevated temperature;   removing said radiation from said body and measuring the initial temperature decrease of the surface with a contactless temperature measurement means to obtain a temperature/time profile of said surface; calculating the thermal conduction coefficient |k | as follows: ##EQU14## and comparing |k | with a standard thermal conduction coefficient, wherein (t) is time, θ o  is the temperature of the surface of said body after heating, θ u  is the temperature of the surroundings, and θ(t) the surface temperature at time (t), whereby said heat insulation shaped body is evaluated.